- Redirect requests to server on error

#75983

#75983

Improve terminal grid dimensions caching

Fixes #77132

Add support for loading webviews from and endpoint that looks like:

```
https://{{uuid}}.contoso.com/path/to/some/commit/index.html
```

This lets us serve each webview from a seperate origin

fix(sash): dragging being difficult with iframe-containing extensions

Make sure we handle the Disposable returned from showActivity

The grammar is contributed by the language basics extension